General
✓✗Which of the following has the largest ionic radius?
- Br−
- Cl−
- I−
- F−
General
✓✗Which of the following orders of radius is NOT correct?
- K > Na > Mg
- Na > Mg > K
- Fe2+ > Fe3+
- O2− > F− > Na+
General
✓✗The atomic radius of noble gases is usually larger than that of the preceding halogens because
- the radius quoted for noble gases is the van der Waals radius
- noble gases have more shells
- noble gases form anions
- noble gases have fewer protons
General
✓✗The electronic configuration of an element is 1s2 2s2 2p6 3s2 3p3. The atomic number of the element just below it in the periodic table is
- 33
- 34
- 49
- 36
General
✓✗Which of the following is a defect of Mendeleev's periodic table?
- It was based on atomic number
- The position of isotopes could not be explained
- It could not predict new elements
- It had no groups
General
✓✗Statement I: The first elements of groups 13 to 17 can form pπ-pπ multiple bonds with themselves.
Statement II: The heavier members of these groups readily form pπ-pπ bonds.
Statement II: The heavier members of these groups readily form pπ-pπ bonds.
- Both Statement I and Statement II are correct
- Both Statement I and Statement II are incorrect
- Statement I is correct but Statement II is incorrect
- Statement I is incorrect but Statement II is correct
General
✓✗Among the following oxides, the one which is most basic is
- Al2O3
- MgO
- N2O5
- ZnO
General
✓✗The formula of the oxide of a group 2 element M is
- M2O
- M2O3
- MO
- MO2
General
✓✗The most stable oxidation states of Tl and Pb are respectively
- +1 and +4
- +3 and +2
- +1 and +2
- +3 and +4
General
✓✗Statement I: Element 113 is expected to be a p-block element of group 13.
Statement II: Element 113 has the outer configuration 7s2 7p1.
Statement II: Element 113 has the outer configuration 7s2 7p1.
- Both Statement I and Statement II are correct
- Both Statement I and Statement II are incorrect
- Statement I is correct but Statement II is incorrect
- Statement I is incorrect but Statement II is correct
General
✓✗One of the characteristic properties of non-metals is that they
- form basic oxides
- are reducing agents
- are electronegative
- form cations by electron gain
General
✓✗The most metallic element among the following is
- Cs
- Al
- Mg
- Si
General
✓✗Dobereiner's triads grouped elements in sets of
- eight
- three
- four
- seven
General
✓✗Identify the correct order of size of the following.
- Ca2+ < Ar < K+ < Cl− < S2−
- Ca2+ < K+ < Ar < S2− < Cl−
- Ar < Ca2+ < K+ < Cl− < S2−
- Ca2+ < K+ < Ar < Cl− < S2−
General
✓✗Which of the following has the highest second ionisation enthalpy?
- Al
- Ca
- Na
- Mg